Afterburner mode with Satori on V1.0 and V1.1 WRT54G - how?

I recently put the Satori public release firmware (Satori-4.0 v2.07.1.7sv)
on my WRT54G V1.0 router. To my surprise in the Wireless Network Mode, in addition to B-Only, G-Only and Mixed there is now an Afterburner mode. What is the purpose of this as I thought only WRT54GS could do afterburner mode.